Hmm... I'm not sure if that's a do-er or a be-er thing? Seems like it might depend on context.
Can we look at it through the lens of direction of influence?
For example, when Luke is about to go do crazy things, Yoda tells him to be calm and get in touch with his feelings.
But in this case, when thing go awry, Harlan immediately lays out a plan of action for Marta. I mean, it's true that in that situation neither one of them would think that they need to just sit and meditate. But what's more Do-er: calling 911 (no matter what the personal consequences), or running away and hiding your tracks to get away with "murder" as per Harlan's advice?
This still sounds like it's consequences of his Do-er actions (he is acting to change the external situation).
Hmm... I don't have an answer for this.
However, another reason I was leaning toward Marta in Mind is that a lot of her conflict stems from people's Fixed Attitudes about her. They can't even remember what country she's from.